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HelpTest ID CRCL Creatinine Clearance, Serum and 24-Hour Urine
Necessary Information
1. 24-Hour volume is required.
2. Patient's height in centimeters and weight in kilograms are required.
Specimen Required
Both serum and urine are required. Serum must be collected no earlier than 72 hours before start of urine collection and no later than 72 hours after urine collection is completed.
Specimen Type: Serum
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Centrifuge and aliquot serum into plastic vial.
2. Label specimen as serum.
Specimen Type: Urine
Supplies: Sarstedt Aliquot Tube, 5 mL (T914)
Specimen Volume: 5 mL
Collection Instructions:
1. Collect urine for 24 hours.
2. Refrigerate specimen within 4 hours of completion of 24-hour collection.
3. Label specimen as urine.
Additional Information: For multiple collections see Urine Preservatives-Collection and Transportation for 24-Hour Urine Specimens
Secondary ID
615813Useful For
Estimation of glomerular filtration rate
Special Instructions
Specimen Type
SerumUrine
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum | Refrigerated (preferred) | |
| Frozen | ||
| Urine | Refrigerated (preferred) | |
| Ambient | ||
| Frozen | ||
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
Reference Values
CREATININE CLEARANCE
Males:
0-18 years: Not established
19-75 years: 77-160 mL/min/body surface area (BSA)
≥76 years: Not established
Females:
0-17 years: Not established
18-29 years: 78-161 mL/min/BSA
30-39 years: 72-154 mL/min/BSA
40-49 years: 67-146 mL/min/BSA
50-59 years: 62-139 mL/min/BSA
60-72 years: 56-131 mL/min/BSA
≥73 years: Not established
CREATININE, URINE:
Reported in units of mg/dL
CREATININE, SERUM
Males:
0-11 months: 0.17-0.42 mg/dL
1-5 years: 0.19-0.49 mg/dL
6-10 years: 0.26-0.61 mg/dL
11-14 years: 0.35-0.86 mg/dL
≥15 years: 0.74-1.35 mg/dL
Females:
0-11 months: 0.17-0.42 mg/dL
1-5 years: 0.19-0.49 mg/dL
6-10 years: 0.26-0.61 mg/dL
11-15 years: 0.35-0.86 mg/dL
≥16 years: 0.59-1.04 mg/dL
Estimated glomerular filtration rate (eGFR)
≥18 years old: ≥60 mL/min/BSA
eGFR calculated using the 2021 CKD-EPI creatinine equation
Note: eGFR results will not be calculated for patients younger than 18 years old.
Day(s) Performed
Monday through Sunday
Report Available
Same day/1 to 2 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
82575
Forms
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
-Kidney Transplant Test Request
-Renal Diagnostics Test Request (T830)